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LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Summary) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Long-term debt obligations |  |
Long-term debt | $ 276,458 | $ 291,675
Less current portion | 48,809 | 54,075
Long-term debt, less current portion | 227,649 | 237,600
Payments under long-term debt obligations |  |
Due in one year or less | 57,780 |
Due after one year through two years | 47,102 |
Due after two years through three years | 83,567 |
Due after three years through four years | 99,600 |
Due after four years through five years | 11,714 |
Total payments | 299,763 |
Less amounts representing interest | 23,305 |
Long-term debt | 276,458 | 291,675
Credit Facility |  |
Long-term debt obligations |  |
Long-term debt | $ 70,000 | 70,000
Interest rate (as a percent) | 3.70% |
Payments under long-term debt obligations |  |
Due in one year or less | $ 2,590 |
Due after one year through two years | 2,383 |
Due after two years through three years | 2,341 |
Due after three years through four years | 70,629 |
Total payments | 77,943 |
Less amounts representing interest | 7,943 |
Long-term debt | 70,000 | $ 70,000
Credit Facility | Interest rate swap agreement |  |
Long-term debt obligations |  |
Amount of borrowings covered by the interest rate swap | $ 50,000 |
Effective fixed interest rate on hedged borrowings (as a percent) | 3.10% | 3.10%
Accounts receivable securitization borrowings |  |
Long-term debt obligations |  |
Long-term debt | $ 40,000 | $ 40,000
Interest rate (as a percent) | 3.40% |
Payments under long-term debt obligations |  |
Due in one year or less | $ 1,338 |
Due after one year through two years | 1,220 |
Due after two years through three years | 40,698 |
Total payments | 43,256 |
Less amounts representing interest | 3,256 |
Long-term debt | 40,000 | 40,000
Notes payable |  |
Long-term debt obligations |  |
Long-term debt | $ 166,248 | 181,409
Weighted-average interest rate (as a percent) | 3.50% |
Payments under long-term debt obligations |  |
Due in one year or less | $ 53,655 |
Due after one year through two years | 43,493 |
Due after two years through three years | 40,521 |
Due after three years through four years | 28,971 |
Due after four years through five years | 11,714 |
Total payments | 178,354 |
Less amounts representing interest | 12,106 |
Long-term debt | 166,248 | 181,409
Finance lease obligations |  |
Long-term debt obligations |  |
Long-term debt | $ 210 | 266
Weighted-average interest rate (as a percent) | 5.60% |
Payments under long-term debt obligations |  |
Due in one year or less | $ 197 |
Due after one year through two years | 6 |
Due after two years through three years | 7 |
Total payments | 210 |
Long-term debt | $ 210 | $ 266

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